Doffing mechanism for spinning, twisting, and like frames



T. A. BOYD ET AL DOFFING MECHANISM FOR SPINNING, TWI STING, AND LIKE FRAMES Filed Sept. 1925 Hal.

Patented Dec. 15, 1925.

, UNITED STATES PATENT OFFICE,

THOMAS ALEXANDER BOYD, HAROLD ARTHUR BOYD, AND JAMES BOYD, 0F GLASGOW,

- SCOTLAND.

DOFFING MECHANISM FOR SPINNING, 'rwrs'rrNe, AND LIKE FRAMES.

" Application filed September 4, 1925. Serial No. 54,439.

To all whom it may concern:

Be it known that we, THOMAS ALEXANDER BOYD, HAROLD ARTHUR BOYD, and JAMES BOYD, subjects of theKing of Great Britain and Northern Ireland, and residing at Glasgow, Scotland, have inventeda certain new and useful Improvement in Dofling Mechanism for Spinning, Twisting, and like Frames, of which the following is a specification. This invention refers to spinning, twisting or like frames in which the fiyers are driven and full bobbins removed from spinningposition and empty bobbins put in their place by dofling mechanism and in which the bobbins are mounted on rotatable carriers each of which carries two or more bobbins for each flyer, the bobbins being in the same vertical plane as the relative flyer and the bobbins and their spindles so disposed that each bobbin as it is moved into working positionshall'be coaxial with the flyer, the axle member or members on which the bobbin carriers are mounted being disposed horizontally at a suitable height and distance in relation to the flyer legs, whether behind or in front'of the, fi ers, or in the same verticalplaneas the yers. ing to thecinvention the axle member or members is or are bored axially to receive a rod or other member adapted to operate yarn cutting devices or other dofling mechanism for a group of spindles. The bearings for the axle member or members are carried on pokers or slides which are traversed up and down by ordinary traverse mechanism. \Vhen a bobbin has been filled with yarn and the machine stopped, the bobbin carrier and axle member are rotated until the fullbobbin is carried clear of the flyer and an empty bobbin carried into working position. Surplus thread is wound from the full on to the empty bobbin and the yarn is then sev-.

ered by actuation of the rod.

In the accompanyin drawings Fig. 1 is an end section view s owing the arrange ment of the bobbins in relation to the flyer in a spinning frame for worsted. Fig. 2 is a plan view of the bobbin carrier and Figs. 3 and 4 respectively, a section and a plan of the cutting device.

1 denotes a stationary horizontal top flyer rail which in practice extends along one side of the frame. In the rail 1 are mounted at suitable distance apart, with their axes Accordvertical, flyers 2 having dependinglegs and each having near its upper end below the rail 1 a wharve 2 by which it may be driven by a tape in usual manner. The yarn 3 to be spun passes down through the flyer bearing to the curl2 at the end of one flyer leg and thence to the spinning bobbin 4:. At a suitable distance in front of the flyers and slightly below the flyer curls 2 when at its highest position we mount a tube 5 disposed horizontally and parallel with the rail 1. The tube 5 is supported for rotation in s JEICQd bearin s 6 carried at the u 3 )er ends I of vertical poker slides 6 to which is imparted a traverse down and up. At a suitable distance behind the slides 6 is a traverse shaft 7 on which is fixed for each slide a chain pulley 8 from which a chain 9 extends to the lower end (i of the slide. Oscillatory motion is imparted to the shaft 7 by usual mechanism. Opposite each flyer there is mounted on the tube 5 a bobbin carrier 10 having a boss 10 embracing the tube On the arm 10 of the bobbin carrier is mounted an upper stud 11 coaxial with the flyer 2, and on the stud 11 is impaled the spinning bobbin 4 on to which the yarn is spun. On. the arm 10 of the bobbin carrier 10 is fixed a lower stud 12 parallel with the stud 11 and so positioned that, when the tube 5 and bobbin carrier 10 perform a semi-rotation about the axis of the tube, the stud 11 and bobbin and the stud l2- and bobbin change places. Thus, when the upper spinning bob bin 4 has been filled, the frame is stopped and the bobbin carrier 10 given one half ro tation whereby the full bobbin 4 is carried from its position in line with the flyer 2 to the front of the tube 5 and inverted. By the same movement the empty bobbin 4; is carried into spinning position. Provision is made to prevent the bobbin 4t wheninverted from falling oif its spindle. \Vhen the full bobbin 4 has passed from Fig. 1 position forward and downwards, it carries with it the spun thread 3 extending from the flyer leg 2 The flyer 2 is now given a few rotations to wind yarn from the full bobbin 4 back to the empty bobbin 4: ready to be severed and to start spinning. To facilitate this winding from bobbin to bobbin a pair of anti-friction rollers 13 are mounted on the bobbin carrier 10. 'On the boss 10 of the bobbin carrier 10 are formed ribs 14 through each of which is bored a ho e 1&

pa 'allel with the tube 5. In the hole in each rib is mounted a cylindrical plunger 15 so as to be an easy fit. The rib and plunger are notched, affording a passage 15 into which the yarn passes from the flyer 2 to the doifed bobbin, so that when the plunger 15 receives an endwise movement it will sever the yarn. Motion is imparted to the plunger 15 by a rod 16 mounted within the tube 5 and fitted with pins 17 each extending through slots in the ribs 1a and boss 10 of the relative bobbin carrier and entering diametral orifices in the plungers 15 so that when the rod 16 is moved endwise it entrains the plunger-s l5, and thus severs the yarn 3 After the yarn S is severed, the frame is re-started. The full bobbins 4c are then removed and empty bobbins r put in their places. i

lVhat we claim is:-

1. In a spinning, twisting or like frame, in combination, a flyer rotatable on a vertical axis, an axially bored axle member rotatable on a horizontal axis, a bobbin carrier mounted on said axle member, said carrier serving to support a plurality of bobbins in the same vertical plane as said flyer and adapted on rotation with said axle member to bring the bobbin to be filled into coaxial relation With said flyer, and yarn cutting means including a member movable in the bore of said axle member.

2. In a spinning, twisting or like frame, in combination, a flyer rotatable on a vertical axis, an axially bored axle member rotatable on a horizontal axis, a bobbin carrier mounted on said axle member, said carrier serving to support a plurality of bobbins in the same vertical plane as said flyer and adapted on rotation with said axle member to bring the bobbin to be filled into coaxial relation with said flyer, and yarn cutting means including a rod movable in the bore of said axle member, and yarn-engaging plungers, one for each bobbin, connected to said rod.

In a spinning, twisting or like frame, in combination, a flyer rotatable on a vertical axis, an axially bored axle member rotatable on a horizontal axis non-planar with the axis of said flyer, a bobbin carrier mounted on said axle member, said carrier serving to support a plurality of bobbins in the same vertical plane as said flyer and adapted on rotation with said axle member to bring the bobbin to be filled into coaxial relation with said flyer, and yarn cutting means including a member movablein the bore of said axle member.

4:. In a. spinning, twisting or like frame, in combination, a flyer, a rotatable carrier, bobbin supporting studs on said carrier, bobbins impaled on said studs adapted to be brought successively into operative relation with said flyer to be filled and to be replaced when full and a pair of anti-friction rollers fitted to said carrier to facilitate the winding of yarn from a full bobbin to an empty bobbin about to be filled.

5. In a spinning, twisting or like frame, in combination, a flyer, a tubular axle member, a bobbin carrier mounted on said axle member and rotatable to bring a bobbin to be filled into operative relation with said flyer, a yarn cutter and arod movable within said tubular axle member to operate said cutter.

In testimony whereof we have signed our names to this specification.

THOMAS ALEXANDER BOYD. HAROLD ARTHUR BOYD. JAMES BOYD. 

